Who is this he ?
Without this we can not answer the question
The parts of speech are the category to which a word is assigned based on its context and use in a sentence. The main categories consist of noun, pronoun, adjective, determiner, verb, adverb, preposition, conjunction, and interjection.
As you read through the list, ask yourself these questions:
Were you born this behavior (biological)
Is this behavior is response to something else (stimulus)
Is this a behavior you learned how to do (learned).
For example, sat quietly in class while the teacher was talking - learned. You learned to be quiet because it was a rule that if broken, you would suffer the consequences. Another example, a car is approaching quickly as you are crossing the street. You run to get out of the way. This is stimulus because you are reacting (responsive) to the car approaching. Lastly, you cry when you see I person you love physically hurt. This is biological.
I'm positively sure its elliptical clause